Roberto Arzu, Sergio Arzu, Gianluca Arzu and Piergiorgio Piras, the four arrested and sent to prison the day after Sandro Arzu's arrest , appeared before the judge of the Lanusei Court for the validation hearing .
They are all under investigation for complicity in murder and aiding and abetting .
None of them answered Judge Nicole Serra's questions yesterday.
Assisting them were lawyers Francesco Marongiu (Roberto and Sergio Arzu), Gianluca Arzu (Pierluigi Concas), Piergiorgio Piras (Fabrizio Demurtas and Pamela Piras).
The investigation concerns the two years of Sandro Arzu's fugitive status and the murders of Mosè Cao and Beniamino Marongiu .
